HISTORY:
A 36-year-old male with no past medical history who initially presented with progressively worsening abdominal pain and distension. CT AP was demonstrative of a large mass within the central portion of the abdomen measuring 24.6 x 13.7 x 21.7 cm. This encased or was intimately associated with a mildly dilated loop of small bowel within the left lower quadrant measuring 3.9 cm in caliber. Concerning for malignancy including gastrointestinal stromal tumor, spindle cell neoplasm, and lymphoma.
GROSS:
What is the most likely diagnosis?
- Myofibromatosis
- Sclerosing mesenteritis/idiopathic retroperitoneal fibrosis
- Mesenteric desmoid-type fibromatosis
- Gastrointestinal stromal tumor (GIST)
Mesenteric desmoid-type fibromatosis